## Summary
- Move the favorite toggle button from the app list sidebar to the app
details page header
- Update AppItem component to show a small filled star indicator for
favorited apps (instead of an interactive button)
- Simplify AppList by removing favorite-related props and hooks
- Update E2E tests to test favorite functionality from the app details
page

## Test plan
- Open an app's details page and verify the favorite button appears next
to the app name
- Click the favorite button and verify the star fills in (app is
favorited)
- Click again to unfavorite and verify the star becomes unfilled
- Return to the app list and verify favorited apps show a small filled
star indicator
- Run E2E tests: `npx playwright test favorite_app.spec.ts`

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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---------
Co-authored-by: Will Chen <willchen90@gmail.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>